Demountable-rim.



W. J. LANE.

DEMOUNTABLB RIM.

APPLIGATIQN FILED 111111.21, 1912.

1.067.744. 1 Batented July 15, 1913.

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u llllll l ATTORNEYS `W1LLIM rJOSEPH LANE, 0F YOUNGSTOWN, OHIO.

DEMUNTABLWRIM.

Specification of Letters Patent.

Patented July-15, 19.13.,

i'pplication led August 21, v1912. Serial rN o. 716,17?.

To all 'whom t may concern:

Be it known that ll, WILLIAM J'. LANE, acitizen of the United States, and a resident of Youngstown, in the county of Mahoning and State of'0hio, have invented a new and Improved Demountable Rim, of which the following is a full, clear, andlexact description.

This invention relates to demount-able rims, and has reference particularly to the class comprising a fixed and removable rim mutually engaged and means for keeping the same in a predetermined position and affording an easyl and rapid separation of the same.

An object of the inventionis to provide an inexpensive and reliable rim that can be easily mounted on and4 removed from a vehicle wheel.

A further object of the invention is to provide a demountable rim formed by two wedging rims and a plurality of wedging bolts evenly distributed on the face 'of the rim.

Reference is to be had to the accompanying drawings forming a part of this speci-- fication in which like characters of reference j indicate corresponding parts in both the views, and in which- Figure 1 is an elevation of a vehicle wheel embodying my invention; and F ig. 2 is a cross section of the same on the line 2 2 of Fig. 1.

Before proceeding to a more detailed description of my invent-ion, it must be under.-

stood that the rubber tire may be attached to the demountable rim in any well .known way, and the number of wedging bolts will vary with the load'that the' wheel has to carry..

Referring more particularly to the drawings, 10 is a solid rubber ring or tire as generally employed on-motorA truck wheels.V

The tire 10 is on itsfinner circular surface provided with a hard rubber strip 11 having also on its inner surface a plurality of circular projections 12, dove-tail in cross-section. The projections 12 on the strip A,11 engage corresponding recesses 13 formed in the outer surface of the exterior circular rim 14 and vulcanized to the surface, whereby the removable rim 14 land the rubber tire form a removable unit. The inner surface 1 5 of theexterior or circumscribing rim' 14 is cone-shaped and provided with a key-way 16 running parallel to the rality of conical holes 23 is elements of the vcone forming the inner surface. Concentric with the exterior rim 14 and inclosed by the same is a vfixed rim 17 having its outer surface 18 also cone-shaped so as to tit snugly into the rim 14. The inner surface of the rim 17 is cylindrical in shape and lits tight on the -felly 19 of the wheel20, and is rigidly attached tothe same soas to form a fixed rim on the fel'ly 19. Av key 21 is provided in the vertical axis of the wheel and on the outer coneshaped surface of the circumscribed fixed rim A17 and engages the key-way 16 of the Smm-'14, whereby lany circular displacement between the rims ,14 and 17 is eliminated if such tendency should exist.

The fixed rim 17, being wider the exterior rim 14 and felly 19, .has a circular portion .22 overhanging the exterior face ofthe felly 19,-and in' said portion a plu provided, evenl spaced and radially directed. AcorrespondY ingI plurality of similar cone-shaped bolts 24 engage the holes 23 and bear against the inclined or beveled surface 25 of the rim 14, said incline 25 being parallel to the elements of the cone forming the bolts 24 and the holes 23. Y, The inner ends of the bolts 24 are provided with washers 26 bearing against the inner cylindrical surface ofthe rim 17 and having its aperture' similarl conical, nuts 27 threaded on the bolts 24 Aand bearing against the lower surface of the Washers 26, and in consequence forcing the conical surface of the bolts 24 against the beveledl face 25 of the rim .14, thus forc ing the rim 14 byl means of its conical surface 15 in frictional engagementwith the similar conical surface 18 of thelixed rim 17 and whereby the two rims are wedged.

As it can be seen from Fig. '2, the two rims 14 and 17 are wedged together in every` element 4of 'the 'conical surfaces in contact, the wedgi g action being produced by the conical. bolts 24 bearin against the inclined or beveled face 25 o the rim 14 and on the opposite side against the conicalv orifices 23 formed in the projecting portions 22 of the fixed rim 17.

To remove the tire from a wheel rovided with my demountable rim it is on y necessary to raise the wheel from the ground, remove the bolts 24 from the rim 17 and then, the Kdemountable rim 14, and the rubber tire fixed on the same forming a removable unit is simply pulled oil", and another unit 14 similar to the one removed is substituted on the -rim 17 and the bolts 24 replaced as originally.

It can be easily seen that with my invention the demountable run is formed of few members, allowing a rapid exchange of tires and forming a reliable rim as the strain produced in the tire by the weightl or motion of the vehicle is largely supported v,by the peripherally contacting conical 15. and 18 and very littleby the bolts 24, as can be easily demonstrated by the parallelogram of forces. It must also be remarked4 that the outer demountable rim 14 can be used over and over again as the rubber tires wear out, there being practically no wear-out to said outer rim. Y

Having thus described my invention, what I claim as new. and desire to secure by Letters Patent is A device of the class described comprising two concentric peripherally contacting rims havin their 'contacting surfaces coneshaped an converging toward the exterior face of the wheel, a keyway on the conical surface of the circumscribing rim in a. direction parallel to the elements forming surfaces'v said conical surface, a key on the conical surface of the circumscribed of said rims formed of a pin projectingl above and normal to the axis of said rim and positioned 'in said keyway to prevent circular displacement between said concentric rims, a beveled face on said circumscribing rim toward which said conical surface converges, a circular portion of said c ircumscribed rim projecting out of said circumscribing rim and in the direction in which the said beveled face is disposed, and a plurality of cone-shaped wedging bolts positioned in said projecting portion and engaging said beveled face, thereby forcing said circumscribing rim to Vwedge on said circumscribed rim, said circumscribing rim being adapted to carry a rubber tire and said circumscribed rim engagingthe telly of a vehicle wheel, substantially as described.

In testimony'whereof I have signed my name to this. specification in the presence of two subscribing witnesses.

WILLIAM JOSEPH LANE.

Witnesses:

J No. C. WILKES CLAUD REzNoR, 

